Patent US2373991A successfully refreshed from Google Patents.
US4238263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Edge sealing of laminate
Assignee: SPECIALTY ACQUISITION Corp A CORP OF DELAWARE
•
Filing: 1978-10-02
•
Granted: 1980-12-09
•
Expires: 1998-10-02
Abstract
Abstract The edge of an interior lamina or laminae of a laminated sheet or film having three or more laminae is positively encapsulated to protect material enclosed by the laminated sheet or film from contacting and interacting with the edge of the interior lamina or laminae. To encapsulate the interior lamina or laminae, the edge of the laminated sheet or film is heated and the molten outer laminae are mechanically forced out and over the interior lamina or laminae to be covered, thereby positively encapsulating the edge of the interior lamina or laminae.
Inventors
- 👤 Lewis C. LoMaglio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:01
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/0044; B29L; B29L2009/00; B31; B31B; B31B50/00; B31B50/74; B31B50/742; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1011; Y10T156/1028; Y10T156/103; Y10T156/1034; Y10T428/00; Y10T428/24; Y10T428/24777
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A method for encapsulating the edge of an interior lamina of a laminated sheet having two outer thermoplastic laminae enclosing at least one interior lamina, the outer lamina having the same length and width as the inner lamina, comprising: a. heating an edge of said laminated sheet sufficiently to cause said outer lamina to reach a molten state by moving said edge past a heat source; and, b. contacting said heated edge with rollers as said heated edge is moved past said heat source to force said outer lamina over said interior lamina or laminae and to encapsulate the edge of said interior lamina or laminae.
Claim 2
Independent Claim
106 words
A method for encapsulating the edge of an interior lamina of a laminated sheet having two outer thermoplastic laminae enclosing at least one interior lamina, the outer lamina having the same length and width as the inner lamina, comprising: a. heating an edge of said laminated sheet sufficiently to cause said outer lamina to reach a molten state by moving said edge past a heat source; and, b. contacting said heated edge with rollers as said heated edge is moved past said heat source to force said outer lamina over said interior lamina or laminae and to encapsulate the edge of said interior lamina or laminae.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said interior lamina is a metal lamina.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein said metal lamina is aluminum foil.
References Cited (Backward Citations)
US2696865A
Cited
US3172571A
Cited
US3307738A
Cited
US3466214A
Cited
US3426102A
Cited
US3976224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |